Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method comprising: measuring a respective quantum bit error rate in each of multiple links between switches in a time-sensitive network, wherein the time-sensitive network is used to communicate data signals at different scheduled time periods based on traffic classifications of the data signals; identifying an increase in the respective quantum bit error rate in a monitored link of the links between the switches; and modifying a configuration of the time-sensitive network so that secret information is not exchanged over the monitored link associated with the increase in the quantum bit error rate.
This invention relates to quantum-secure communication in time-sensitive networks (TSNs), addressing the challenge of detecting and mitigating quantum bit error rate (QBER) increases that could compromise secure data transmission. In a TSN, data signals are communicated at scheduled time periods based on traffic classifications, ensuring low-latency and deterministic performance. The method involves measuring the QBER in multiple links between network switches to monitor quantum key distribution (QKD) security. If an increase in QBER is detected in a monitored link, the network configuration is dynamically adjusted to prevent the exchange of secret information over that link, thereby maintaining security. This may involve rerouting traffic, disabling the affected link, or adjusting encryption parameters. The approach ensures that even if a link is compromised, sensitive data is protected by avoiding its use for secure communications. The solution is particularly relevant for networks requiring both real-time performance and quantum-resistant security, such as financial, military, or critical infrastructure systems.
2. The method of claim 1 , wherein the secret information includes one or more of a quantum encryption key, an indication of non-repudiation, or a data hash.
This invention relates to secure communication systems, specifically methods for transmitting secret information between parties. The problem addressed is the need to securely convey sensitive data, such as cryptographic keys, non-repudiation indicators, or data hashes, in a way that prevents unauthorized access or tampering. The method involves generating secret information, which may include a quantum encryption key, a non-repudiation indicator, or a data hash. Quantum encryption keys are used in quantum key distribution (QKD) systems to enable secure communication by leveraging the principles of quantum mechanics. Non-repudiation indicators ensure that a party cannot deny having performed a transaction or communication, providing legal and operational accountability. Data hashes are cryptographic representations of data used for integrity verification. The secret information is then transmitted between parties using a secure communication channel. This channel may be physical, such as a direct wired or optical link, or logical, such as an encrypted network connection. The transmission process ensures that the secret information remains confidential and tamper-proof during transit. The method may also include verifying the integrity and authenticity of the transmitted information to confirm that it has not been altered or intercepted. This approach enhances security in applications requiring high-assurance communication, such as military, financial, or government systems, where unauthorized access or tampering could have severe consequences. The use of quantum encryption keys, non-repudiation indicators, and data hashes provides multiple layers of protection, ensuring that the transmitted information remains secure throughout the process.
3. The method of claim 1 , wherein the quantum bit error rates are measured in the links that form a quantum channel between computing devices, the quantum channel dedicated to exchanging the secret information.
This invention relates to quantum communication systems, specifically methods for measuring quantum bit error rates (QBER) in quantum channels used for secure information exchange. The technology addresses the challenge of ensuring reliable quantum key distribution (QKD) by monitoring error rates in quantum links to detect eavesdropping or transmission errors. The method involves measuring QBER in the quantum links that form a dedicated quantum channel between computing devices, where the channel is used exclusively for exchanging secret information. By analyzing these error rates, the system can assess the security and integrity of the quantum communication. The method may also include steps for error correction or key reconciliation based on the measured QBER values. This approach enhances the reliability and security of quantum communication by providing real-time error monitoring in the quantum channel, ensuring that any anomalies or potential breaches are detected promptly. The invention is particularly useful in quantum networks where secure transmission of cryptographic keys or other sensitive data is critical.
4. The method of claim 1 , wherein modifying the configuration of the time-sensitive network includes changing a schedule for communication of the secret information and the data signals within the time-sensitive network, the data signals defining time-sensitive messages and best-effort messages.
A method for modifying the configuration of a time-sensitive network (TSN) to enhance secure communication involves adjusting the schedule for transmitting secret information and data signals within the network. The data signals include time-sensitive messages, which require strict timing guarantees, and best-effort messages, which do not have such constraints. By dynamically altering the schedule, the method ensures that secret information is transmitted in a manner that maintains security while accommodating the timing requirements of time-sensitive messages. This approach optimizes network performance by balancing the delivery of critical data with the need for secure communication. The method may also involve reconfiguring other aspects of the network, such as bandwidth allocation or priority settings, to further improve efficiency and security. The solution addresses challenges in TSN environments where both real-time performance and data confidentiality are essential, providing a flexible way to adapt the network's behavior to varying operational demands.
5. The method of claim 4 , wherein changing the schedule includes changing which of the links are used to exchange the secret information between computing devices.
A system and method for securely exchanging secret information between computing devices involves dynamically adjusting communication schedules to enhance security. The method addresses the challenge of protecting secret information during transmission by varying the links used for exchange, making it harder for adversaries to intercept or predict the communication pattern. The system includes multiple computing devices connected via a network with multiple communication links. A schedule determines which links are used for exchanging secret information at different times. The schedule is periodically changed to alter the links used, thereby introducing unpredictability in the communication path. This dynamic adjustment helps prevent eavesdropping and other attacks by avoiding reliance on a fixed communication route. The method ensures that the secret information is transmitted securely by continuously modifying the links, reducing the likelihood of successful interception. The system may also include mechanisms to synchronize the schedule changes across devices to maintain secure communication. By dynamically selecting different links, the method improves the resilience of the communication process against potential security threats.
6. The method of claim 1 , further comprising instructing computing devices that exchange the secret information to change the secret information at a faster rate than a rate at which the secret information is changed prior to identifying the increase in the quantum bit error rate in the monitored link.
The invention relates to secure communication systems where secret information, such as cryptographic keys, is exchanged between computing devices over a monitored link. The core problem addressed is the vulnerability of these systems to eavesdropping or interception, particularly when quantum key distribution (QKD) is used, where the security relies on the integrity of the exchanged keys. The method involves monitoring the quantum bit error rate (QBER) on the link, which serves as an indicator of potential security breaches—higher error rates suggest increased interception or noise. Upon detecting an increase in the QBER, the system dynamically adjusts the rate at which secret information is refreshed or regenerated. Specifically, the computing devices are instructed to change the secret information at a faster rate than the pre-incident rate. This accelerated refresh rate aims to mitigate the risk of compromised keys by reducing the window of opportunity for an attacker to exploit intercepted data. The approach leverages real-time monitoring and adaptive response to enhance security in quantum-secure communication channels.
7. The method of claim 6 , wherein the computing devices are instructed to change the secret information at least once for each new message that is exchanged between the computing devices.
This invention relates to secure communication between computing devices, addressing the challenge of maintaining confidentiality and integrity of exchanged messages. The method involves dynamically updating secret information used for encryption or authentication to prevent unauthorized access. Specifically, the computing devices are configured to change the secret information at least once for each new message exchanged, ensuring that each communication session uses a unique key or credential. This approach mitigates risks associated with long-term key exposure, such as eavesdropping or replay attacks. The secret information may include cryptographic keys, session tokens, or other authentication credentials. By enforcing frequent updates, the system enhances security by reducing the window of opportunity for an attacker to exploit compromised or intercepted data. The method may be applied in various secure communication protocols, such as end-to-end encrypted messaging, secure file transfers, or authenticated API calls, where maintaining message confidentiality and authenticity is critical. The dynamic key management ensures that even if one message is compromised, subsequent communications remain secure. This technique is particularly useful in environments where devices operate over untrusted networks or where long-term key storage is impractical.
8. The method of claim 6 , wherein the computing devices are instructed to change the secret information at least once for each frame of each new message that is exchanged between the computing devices.
This invention relates to secure communication between computing devices, specifically addressing the challenge of maintaining cryptographic security during message exchanges. The method involves dynamically updating secret information used for encryption or authentication to prevent unauthorized access. The secret information is changed at least once for each frame of every new message exchanged between the devices. This frequent updating enhances security by reducing the window of opportunity for an attacker to exploit compromised or intercepted secrets. The method ensures that even if a frame is compromised, the secret information for subsequent frames remains secure. The computing devices are synchronized to coordinate these updates, ensuring seamless and secure communication. This approach is particularly useful in environments where messages are divided into multiple frames, such as in real-time communication systems or high-security data transfers. The dynamic updating of secrets mitigates risks associated with static or long-term key usage, improving overall communication security.
9. A system comprising: one or more processors configured to measure a respective quantum bit error rate in each of multiple links between switches in a time-sensitive network, wherein the time-sensitive network is used to communicate data signals at different scheduled time periods based on traffic classifications of the data signals, the one or more processors also configured to identify an increase in the respective quantum bit error rate in a monitored link of the links between the switches, and to modify a configuration of the time-sensitive network so that secret information is not exchanged over the monitored link associated with the increase in the quantum bit error rate.
This system monitors quantum bit error rates in a time-sensitive network (TSN) to detect potential security threats. The network uses scheduled time periods to transmit data signals based on their traffic classifications, ensuring reliable communication. The system employs one or more processors to measure error rates in multiple links between switches. If an increase in error rate is detected in a monitored link, the system modifies the network configuration to prevent the exchange of secret information over that link. This approach enhances security by dynamically adjusting traffic routing to avoid compromised links, ensuring that sensitive data is not transmitted over potentially insecure paths. The system is particularly useful in environments where quantum communication or high-security data transmission is required, as it proactively mitigates risks associated with error rate fluctuations. By continuously monitoring and adapting the network, the system maintains the integrity and confidentiality of transmitted data.
10. The system of claim 9 , wherein the secret information includes one or more of a quantum encryption key, an indication of non-repudiation, or a data hash.
A system for secure data transmission and verification in quantum communication networks addresses the challenge of maintaining confidentiality, integrity, and non-repudiation in high-security environments. The system integrates quantum encryption techniques to protect transmitted data, ensuring that intercepted information remains unreadable without the correct decryption key. It also incorporates mechanisms to verify the authenticity and integrity of transmitted data, preventing unauthorized modifications and ensuring that the sender cannot deny having sent the data. The system further includes a data hash function to generate a unique fingerprint of the transmitted data, allowing recipients to confirm that the received data matches the original. This combination of quantum encryption, non-repudiation indicators, and data hashing provides a robust framework for secure communication, particularly in applications requiring high levels of trust and security, such as military, financial, or government communications. The system dynamically adapts to varying security requirements, ensuring that the appropriate level of protection is applied based on the sensitivity of the data being transmitted.
11. The system of claim 9 , wherein the one or more processors are configured to measure the quantum bit error rates in the links that form a quantum channel between computing devices, the quantum channel dedicated to exchanging the secret information.
The invention relates to quantum communication systems designed to securely exchange secret information between computing devices using a dedicated quantum channel. The system employs one or more processors to measure quantum bit error rates (QBER) in the links forming the quantum channel. These measurements are used to assess the integrity and security of the quantum communication, as higher error rates may indicate potential eavesdropping or channel degradation. By monitoring QBER in real-time, the system can detect anomalies and ensure the confidentiality of transmitted secret information. The quantum channel is specifically allocated for this purpose, distinguishing it from classical communication channels. The processors analyze the error rates to maintain secure quantum key distribution (QKD) or other quantum cryptographic protocols, enabling reliable and tamper-evident data exchange between quantum computing devices.
12. The system of claim 9 , wherein the one or more processors are configured to modify the configuration of the time-sensitive network by changing a schedule for communication of the secret information and the data signals within the time-sensitive network, the data signals defining time-sensitive messages and best-effort messages, the one or more processors configured to change the schedule by changing which of the links are used to exchange the secret information is exchanged between computing devices.
A system for managing communication schedules in a time-sensitive network to enhance security and efficiency. The system includes one or more processors that dynamically adjust the network's configuration by modifying the transmission schedule for secret information and data signals. The data signals consist of time-sensitive messages, which require strict timing guarantees, and best-effort messages, which have more flexible delivery requirements. The processors alter the schedule by reassigning which network links are used to exchange the secret information between computing devices. This reconfiguration ensures that sensitive data is transmitted over optimized paths while maintaining the performance of critical time-sensitive communications. The system aims to improve security by controlling the routing of secret information and to optimize network resource utilization by dynamically adapting to changing traffic conditions or security needs. The modification of the schedule is performed in real-time or near-real-time to respond to network conditions or security threats.
13. The system of claim 9 , wherein the one or more processors are configured to instruct computing devices that exchange the secret information to change the secret information at a faster rate than a rate at which the secret information is changed prior to identifying the increase in the quantum bit error rate in the monitored link.
The invention relates to a system for managing secret information exchange in a communication network, specifically addressing the challenge of maintaining secure data transmission when quantum bit error rates (QBER) increase. The system includes one or more processors that monitor a communication link for changes in QBER, which may indicate potential security threats or degradation in the quantum channel. Upon detecting an elevated QBER, the processors dynamically adjust the rate at which secret information—such as cryptographic keys—is refreshed across the network. This adjustment ensures that the secret information is updated more frequently than before the QBER increase was identified, thereby enhancing security and reducing the risk of unauthorized access or data compromise. The system may operate in environments where quantum key distribution (QKD) or other secure communication protocols are employed, ensuring continuous protection against evolving threats. By proactively increasing the refresh rate of secret information in response to detected anomalies, the system maintains robust security without requiring manual intervention.
14. The system of claim 13 , wherein the one or more processors are configured to instruct the computing devices to change the secret information at least once for each new message is exchanged between the computing devices.
A system for secure communication between computing devices addresses the challenge of maintaining confidentiality and integrity of exchanged messages in the presence of potential eavesdropping or tampering. The system employs cryptographic techniques to protect data during transmission, with a focus on dynamically updating security parameters to mitigate risks associated with prolonged use of static keys or identifiers. Specifically, the system includes one or more processors that manage cryptographic operations, such as encryption, decryption, and authentication, to ensure that messages remain secure during exchange. A key feature of the system is its ability to instruct the computing devices to change secret information, such as cryptographic keys or session identifiers, at least once for each new message exchanged. This dynamic updating mechanism enhances security by reducing the window of vulnerability that could be exploited by an attacker. The system may also include additional components, such as memory storage for storing cryptographic keys or configuration data, and network interfaces for facilitating communication between devices. By continuously refreshing the secret information, the system minimizes the risk of compromise and ensures that even if a single message is intercepted, subsequent messages remain protected due to the use of different cryptographic parameters. This approach is particularly valuable in environments where long-term security is critical, such as financial transactions, military communications, or sensitive data exchanges.
15. The system of claim 13 , wherein the one or more processors are configured to instruct the computing devices to change the secret information at least once for each frame of each new message that is exchanged between the computing devices.
This invention relates to secure communication systems designed to protect data exchanged between computing devices. The problem addressed is the vulnerability of static or infrequently updated secret information, such as encryption keys, which can be compromised if intercepted or guessed. The system dynamically updates secret information to enhance security during message exchanges. The system includes computing devices configured to exchange messages using secret information, such as cryptographic keys or tokens, to authenticate or encrypt communications. The secret information is periodically updated to prevent unauthorized access. Specifically, the system ensures that the secret information is changed at least once for each frame of every new message exchanged between the devices. This frequent updating minimizes the window of opportunity for an attacker to exploit the secret information, even if they intercept part of the communication. The computing devices may include processors that manage the generation, distribution, and updating of the secret information. The system may also include mechanisms to synchronize the updates across devices, ensuring that both parties can decrypt or authenticate messages correctly. The dynamic updating process may involve generating new secret information based on a shared algorithm, a time-based protocol, or a challenge-response mechanism. The system may also include error-handling features to manage cases where updates fail or are delayed, ensuring continuous secure communication. This approach improves security by reducing the risk of key compromise and ensuring that even if part of a message is intercepted, the secret information used for subsequent frames or messages will differ. The system is applicable to various secure c
16. The system of claim 9 , wherein the one or more processors are configured to measure the quantum bit error rates in at least some links in the time-sensitive network that are used to communicate the secret information during a first scheduled time period and to communicate the data signals which represent time-sensitive messages during a second scheduled time period.
This invention relates to a quantum communication system integrated with a time-sensitive network (TSN) to securely transmit secret information while ensuring reliable delivery of time-sensitive messages. The system addresses the challenge of maintaining both quantum key distribution (QKD) security and TSN performance, which typically operate under conflicting requirements. The system includes a quantum communication module that generates and distributes quantum keys for encrypting secret information, and a TSN module that schedules and transmits time-sensitive messages with strict latency and reliability guarantees. The system dynamically allocates network resources to separate quantum key distribution and TSN traffic, preventing interference. The one or more processors in the system measure quantum bit error rates (QBER) in network links during a first scheduled time period dedicated to quantum communication, ensuring secure key distribution. During a second scheduled time period, the same links are used for transmitting time-sensitive messages, such as industrial control signals or financial transactions, with guaranteed low-latency delivery. The system synchronizes these time periods to avoid conflicts, ensuring both secure quantum communication and reliable TSN performance. This approach enables secure and time-critical applications in industries like finance, defense, and industrial automation.
17. The system of claim 9 , wherein the one or more processors represent hardware circuitry of a control system of the time-sensitive network.
A time-sensitive network (TSN) control system includes hardware circuitry configured to manage and optimize data transmission in real-time applications. The system ensures deterministic latency and synchronization across networked devices, addressing challenges in industrial automation, automotive systems, and other domains requiring precise timing. The hardware circuitry executes control algorithms to prioritize time-sensitive data packets, allocate bandwidth dynamically, and synchronize clocks across network nodes. This ensures reliable communication in environments where delays or jitter could disrupt operations. The circuitry may also monitor network performance, detect anomalies, and adjust configurations to maintain quality of service. By integrating these functions into dedicated hardware, the system reduces reliance on software-based processing, improving efficiency and reducing latency. The control system interfaces with TSN switches, endpoints, and other network components to enforce timing policies and coordinate data flows. This approach enhances predictability and reliability in time-critical applications, such as factory automation, autonomous vehicles, and medical devices. The hardware circuitry may include specialized processors, field-programmable gate arrays (FPGAs), or application-specific integrated circuits (ASICs) tailored for TSN operations. The system supports multiple TSN standards, including IEEE 802.1Qbv for time-aware scheduling and IEEE 802.1AS for clock synchronization. By embedding control logic in hardware, the system achieves faster response times and lower power consumption compared to software-based solutions. This enables seamless integration into existing TSN infrastructures while ensuring compliance with real-time communication requ
18. A method comprising: instructing computing devices that communicate messages with each other via a time-sensitive network to securely exchange the messages using secret information, wherein the messages are exchanged between the computing devices via multiple switches and links of the time-sensitive network, the links disposed between the switches, the messages communicated through the time-sensitive network at different scheduled time periods based on traffic classifications of the messages; directing the computing devices to exchange the secret information via at least some of the switches and links of the time-sensitive network that are used to exchange the messages; and instructing the computing devices to change the secret information for one or more of each of the messages or each frame of the messages exchanged between the computing devices.
This invention relates to secure communication in time-sensitive networks (TSNs), which are used in industrial and automotive systems where real-time data transmission is critical. The problem addressed is ensuring secure message exchange between computing devices in a TSN while maintaining deterministic timing guarantees. TSNs prioritize traffic based on classifications, scheduling messages at specific time periods, but traditional security methods can disrupt this timing or introduce latency. The method involves instructing computing devices to exchange messages securely using secret information, such as encryption keys, over a TSN infrastructure comprising multiple switches and links. The same network paths used for regular message traffic are also used to distribute the secret information, ensuring that security mechanisms do not require additional network resources. Additionally, the method directs the computing devices to dynamically change the secret information for each message or each frame of the messages, enhancing security by reducing the risk of key compromise. This approach ensures that security operations align with the TSN's deterministic scheduling, preventing disruptions to real-time communication while maintaining confidentiality and integrity.
19. The method of claim 16 , further comprising: measuring a respective quantum bit error rates rate in each of the links of the time-sensitive network that are used to exchange the secret information; identifying an increase in the respective quantum bit error rate in a monitored link of the links; and modifying a configuration of the time-sensitive network so that the secret information is not exchanged over the monitored link associated with the increase in the quantum bit error rate.
A time-sensitive network for secure quantum communication employs quantum key distribution (QKD) to exchange secret information between nodes. The system monitors quantum bit error rate (QBER) across all active links in real time to detect anomalies that could indicate eavesdropping or environmental interference. When an increase in QBER is detected on a specific monitored link, the network dynamically reconfigures its routing paths to avoid using that link for subsequent secret information exchanges. This ensures continuous secure communication by preventing compromised or unstable links from degrading the integrity of the transmitted data. The adaptive reconfiguration process maintains low-latency and high-reliability requirements typical of time-sensitive networks while mitigating security risks associated with elevated error rates. The system prioritizes maintaining secure communication channels by rerouting secret information through alternative paths with acceptable QBER levels, thereby preserving both performance and confidentiality in the network.
20. The method of claim 1 , wherein the quantum bit error rates are measured in at least some links in the time-sensitive network that are used to communicate the secret information during a first scheduled time period and to communicate the data signals which represent time-sensitive messages during a second scheduled time period.
This invention relates to quantum communication systems, specifically methods for managing quantum bit error rates in time-sensitive networks that share resources between quantum key distribution (QKD) and time-sensitive data transmission. The problem addressed is the interference between quantum communication and conventional time-sensitive data signals when both use the same network infrastructure, leading to potential errors in quantum key distribution. The method involves measuring quantum bit error rates in network links during distinct time periods. During a first scheduled time period, the links are used exclusively for communicating secret information, such as quantum keys, while in a second scheduled time period, the same links carry time-sensitive data signals, such as real-time control or media streaming. By isolating these functions temporally, the method reduces interference and ensures reliable quantum key distribution without degrading time-sensitive data transmission performance. The error rate measurements help assess the impact of shared network usage and optimize scheduling to maintain security and data integrity. This approach enables efficient coexistence of quantum and classical communication in shared network infrastructure.
Unknown
October 27, 2020
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